Answer:
Habitat loss, uncontrolled hunting
Explanation:
Lots of hand waving as is in the current field of much of molecular biology. Other than that experiments and observations. Basically the utilization of the scientific method and then trying to find the mechanism by which something occurs through even more research/experimentation.
HOPE THIS HELPS
Answer:
d) The process of meiosis produces haploid cells
Explanation:
<em>Meiosis is a form of cell division that involves sex cells. A single diploid sex cell divides twice (meiosis I and meiosis II) to produce four haploid daughter cells. Meiosis is sometimes referred to as reductional cell division because involves halving of the chromosome number of the parent cell.</em>
When meiosis takes place in animals, the haploid cells produced can be directly referred to as gametes. However, in plants, haploid cells give rise to haploid gametophytic generations or simply gametophytes. The gametophytes eventually gives rise to gametes.
Hence, the most correct option is d.
Answer:
100%, 50%
Explanation:
<em>A testcross involves crossing an organism of unknown zygosity with its homozygous recessive version.</em>
Assuming the purple flower pea plant is homozygous for the trait with genotype PP and it is crossed with homozygous recessive pea plant pp.
PP x pp = Pp, Pp, Pp, and Pp
100% of the progeny will be purple in appearance.
On the other hand, assuming the purple flower pea plant is heterozygous with genotype Pp and this is testcrossed with a pp plant.
Pp x pp = Pp, Pp, pp, and pp
50% of the progeny will be purple and the remaining 50% will be white.
<em>Hence, If you were to perform a test-cross to determine the genotype of a purple-flowered plant, you would expect the percentage of purple-flowered progeny to be </em><em>100%</em><em> if the plant is homozygous and </em><em>50% </em><em>if the plant is heterozygous.</em>
